{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "54612",
    "entityType": "User",
    "nonce": "0xba74235c1e254acee314c305a45f408a372d120d2549a0d0a75dcb63219ea441",
    "signature": "0x535e9749809c6fef2dcc5e35f0333da8d406f7d012c08d7298ec02060210f36e1fe3a6980afe5c47dbbed060420638fd5a168247e07219e33aff5f01e04785431b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}